摘要
基于祁连山及其周边地区31个气象站点1958-2013年的气温降水数据,使用一元回归分析、Mann-Kendall检验和滑动t检验等方法,分析了近55 a来祁连山东段和西段地区气温和降水的变化趋势及其区域差异;结合前人对祁连山地区湖泊的古气候重建工作,对比分析祁连山东段与西段地区不同的气候记录,进一步揭示其区域古今气候差异.结果表明,在年代际尺度上,祁连山地区降水量和气温整体上呈暖湿化趋势,东段地区年均气温高于西段,年降水量由东向西递减;东段地区多年平均气温和降水量的增长幅度均小于西段地区.在千年尺度上,祁连山东段地区表现为早中全新世温暖湿润,晚全新世寒冷干燥,与亚洲季风区全新世气候变化模式一致;西段地区气候适宜期在中全新世,晚全新世呈湿润化趋势,可能主要受西风带控制.
the temperature and precipitation data of 31 meteorological stations in the Qilian Mountain and its surrounding areas from 1958 to 2013 were used to analyze the variation trends and regional differences of temperature and precipitation in the eastern and western parts of Qilian Mountains in the recent 55 years by using the unary regression analysis,Mann-Kendall test and sliding t test.Based on the paleoclimate reconstruction of lakes in the Qilian Mountains,the different climatic records in the eastern and western sections thereof were compared and analyzed,thus further revealing the regional differences of ancient and modern climates.The results showed that,on the interannual scale,the precipitation and temperature in the Qilian Mountains manifested a warming and wetting trend,the average annual temperature in the east was higher than that in the west,and the annual precipitation decreased from east to west.The increasing range of annual average temperature and precipitation in the eastern region was smaller than that in the western region.On the millennial-scale,the eastern Qilian Mountains experienced warm and humid climate in the early and middle Holocene;cold and dry climate in the late Holocene,which was consistent with the climate change model of the Asian monsoon.The climatic optimum period of the western region was the middle Holocene,and the late Holocene showed a wetting trend,which might have been controlled by the westerlies.
作者
刘和斌
李育
张新中
徐玲梅
Liu He-bin;Li Yu;Zhang Xin-zhong;Xu Ling-mei(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第6期724-732,共9页
Journal of Lanzhou University(Natural Sciences)
基金
国家重点研发计划项目(2019YFC0507401)
国家自然科学基金项目(42077415,41822708)
第二次青藏高原综合科学考察研究项目(2019QZKK0202)
中国科学院战略性先导科技专项(XDA20100102)
关键词
区域差异
气温
降水
时间尺度
祁连山
regional difference
temperature
precipitation
time scale
Qilian Mountains
